I have a 2010 38' Holiday Rambler Endeavor that has 2 Carrier Air V Heat Pump air conditioners that are tied into 2 propane powered furnaces.
Recently, I had travelled away from the RV during the holidays. During my week plus away, there was a power outage at the RV.
When the shore power is removed, the Carrier air conditioner (roof top) and furnace controller turns off. That created a problem. Here is a little background information regarding the air conditioner / furnace control:
There is no fixed thermostat / air conditioner / furnace control that is 'wall mounted' on these 2 devices. They are controlled by a RF remote control. Control is split into 5 functions - Furnace, Cool, Dry, Fan and Heat. Heat includes using the heat pump function of the Carrier Air V Heat Pump when the temperature differential (inside versus outside) provides sufficient capacity for the heat pump to function.
Back to what happened. When we left the RV, I turned off the water heater, ice maker and turned off the water at the spigot. I set both furnaces to 55 degrees F and thought all would be well.
What happened was a power drop out occurred sometime during my time away, shut off both Carrier units and with the cold temperatures, caused the water, soda and other liquids in the RV to freeze.
The water in the lines, as it began to freeze, had no where to go as it turned to a solid (ice) and caused the entire coach water filter housing to fracture, a PEX adapter on the back of the water heater, the spray nozzle attached to the toilet and the shower head (I don't understand why the toilet sprayer and shower head cracked as they are on the other side of their respective valves, which were closed, but it really doesn't matter).
Obviously frustrated, I fixed the issues and am back in operation. However, I wanted to solve the problem from occurring in the future, even though mitigation methods (open valves in the coach, etc) would prevent the water filter and other things from rupturing or cracking, it would not prevent the soda cans inside the coach from bursting (one did and 5 others were on their way) and the fabric softener turned to gel.
So, I looked into 3 things. 1) Install a temperature monitor (I have installed 2 devices - a ring brand flood / freeze sensor - all it tells me is that water has gotten into the area where the sensor is places or that freezing temperatures are eminent) and 2) a temperature / humidity monitor that provides analog temperature and humidity readings. the ring flood / freeze sensor ties into the ring alarm system I have installed and the temp / humidity sensor attaches to the wifi I have set up in the coach (currently tied into a service provided at the RV park, but I also have a device that uses cell networks for internet / wifi router capability, but I am disgusted with it as it is horrifically limited on data capacity and throughput). and 3) a way to control the Carrier Air V Heat Pump units remotely via the internet, much like an EcoBee thermostat for your home.
In searching for a solution to #3 above, I learned that Carrier has discontinued the Air V Heat Pump units that I have and the remote controls are no longer available, except for eBay. I searched and found a product called Breez Plus by Cielo. It provides RF control of furnaces and air conditioners, much like the remote control for the Carrier Air V Heat Pump units on my coach. I ordered one, received it and proceeded installing it. It attached to the wifi I have and I proceeded to configure the device. Unfortunately, I could not find the Carrier Air V Heat Pump listed on the manufacturer listing and the 'self detect / configure' feature on the Breez Plus software (app on my phone) didn't detect the signal coming from the Carrier Air V Heat Pump remote control.
So, I called Cielo and spoke to 2 technical support people. The first person was called away for some reason, hence why I worked with the second person. I described the issue to him and he had me do a number of things that had him 'capture' the commands from the Carrier Air V remote control. He walked me through the temperature ranges and modes, and said that he had sufficient information to compile a configuration that should work for my situation.
He said that he would get back to me within the next week or so with a configuration. The NEXT DAY, he called me, he loaded a configuration and we walked through the operation of the Carrier Air V unit using the Cielo Breez Plus which was being remotely controlled by my smart phone through the internet. I have since had the chance to use it for a couple of days and it does the job. However, I am going to talk to the Cielo tech support staff about making a few changes. 1) Change the temp range for heat from 64 to 90 deg F to 55 to 81. I don't need 90 degrees as a set point for my furnaces! Also, while away, I like to set the furnace control point to 55 to save some propane. 2) discuss with them some additional features of the unit as a schedule for 'set back' to have the furnaces dial back down to 55 degrees when we sleep.
The Cielo Breez Plus together with the ring flood / freeze alarm and the cargo bay temperature / humidity sensor solves my problem of loss of temperature management in this way:
If power is lost and the furnaces turn off, when the temperature outside drops, I will receive an alert from the temp / humidity sensor (I set an alarm at 37 degrees) telling me that the temp is falling. Also, if I lose AC power, I do get an alert from Ring as it goes to battery an cellular backup upon loss of power (I don't lose Ring power for short times as I have it powered by a UPS, but I DO LOSE Internet as the server here at the RV park shuts off, killing my internet access). I then can cycle power via the Cielo Breez Plus and get the furnaces back up and running. I will see the temperature then rise as the furnaces bring the temps up (I will see this from the temp rise on the Cielo unit as well as the cargo bay temp sensor).
I will continue to exercise the Cielo Breez Plus and learn more about its capabilities. I will also conduct a test in the next day or two to verify my recovery plan is sound (I also will write up a procedure for recovery and have it on my laptop and cell phone as I get older, I have increased 'selective memory' or 'senior moments'.
I am grateful that God has given me the ability to work through these kind of situation and wanted to post this information in that it might help someone else.
All in all, I am happy with the Cielo Breez Plus unit to solve the issue of regaining control of the furnaces if a power drop out occurs while I am away I will likely order a second unit for the second air conditioner / furnace that's in the bedroom of the coach.